/*
MD_Parola - Library for modular scrolling text and Effects
  
See header file for comments
  
Copyright (C) 2013 Marco Colli. All rights reserved.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <MD_Parola.h>
#include <MD_Parola_lib.h>
/**
 * \file
 * \brief Implements mesh effect
 */

void MD_PZone::effectMesh(bool bIn)
// Text enters with alternating up/down columns
{
  bool bUp = true;
  
	if (bIn)	// incoming
	{
		switch (_fsmState)
		{
		case INITIALISE:
			PRINT_STATE("I MESH");
			_nextPos = 0;
			_fsmState = PUT_CHAR;
			// fall through to next state

		case GET_FIRST_CHAR:
		case GET_NEXT_CHAR:
		case PUT_CHAR:
		case PAUSE:
			PRINT_STATE("I MESH");

			zoneClear();
			commonPrint();

			for (uint8_t c = ZONE_START_COL(_zoneStart); c <= ZONE_END_COL(_zoneEnd); c++)
      {
				// scroll the whole display so that the message appears to be animated
				// Note: Directions are reversed because we start with the message in the 
				// middle position thru commonPrint() and to see it animated move DOWN we 
				// need to scroll it UP, and vice versa.
        uint8_t col = _MX->getColumn(c);
        
        col = (bUp ? col >> COL_SIZE-1-_nextPos : col << COL_SIZE-1-_nextPos);
				_MX->setColumn(c, col);
        bUp = !bUp;
      }            

			// check if we have finished
			_nextPos++;
			if (_nextPos == COL_SIZE) _fsmState = PAUSE;
			break;

		default:
			PRINT_STATE("I MESH");
			_fsmState = PAUSE;
		}
	}
	else	// exiting
	{
		switch (_fsmState)
		{
		case PAUSE:
		case INITIALISE:
			PRINT_STATE("O MESH");
			_nextPos = 1;
			_fsmState = PUT_CHAR;
			// fall through to next state

		case GET_FIRST_CHAR:
		case GET_NEXT_CHAR:
		case PUT_CHAR:
			PRINT_STATE("O MESH");

			for (uint8_t c = ZONE_START_COL(_zoneStart); c <= ZONE_END_COL(_zoneEnd); c++)
			{
  			uint8_t col = _MX->getColumn(c);
  			
  			col = (bUp ? col << _nextPos : col >> _nextPos);
  			_MX->setColumn(c, col);
  			bUp = !bUp;
			}

			// check if we have finished
			_nextPos++;
			if (_nextPos == COL_SIZE) _fsmState = END;
			break;

		default:
			PRINT_STATE("O MESH");
			_fsmState = END;
			break;
		}
	}
}
